Deus Ex has just been moved to the next fiscal year, starting in April. This means they will get more time to finish it and Square Enix will probably have a game to up their profit in the first quarter.This after FFXIV was a big disappointment, both as a game and in sales

Deus Ex: Human Revolution will be released on March (8th in US, 31st in Europe ). A straight run through the story in order to complete it will take around 25 hours, far more if you explore each levels and their different solutions